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f9ead18c JA |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/kernel.h> | |
3 | #include <linux/errno.h> | |
4 | #include <linux/file.h> | |
5 | #include <linux/slab.h> | |
6 | #include <linux/net.h> | |
7 | #include <linux/compat.h> | |
8 | #include <net/compat.h> | |
9 | #include <linux/io_uring.h> | |
10 | ||
11 | #include <uapi/linux/io_uring.h> | |
12 | ||
f9ead18c | 13 | #include "io_uring.h" |
3b77495a | 14 | #include "kbuf.h" |
43e0bbbd | 15 | #include "alloc_cache.h" |
f9ead18c | 16 | #include "net.h" |
06a5464b | 17 | #include "notif.h" |
10c7d33e | 18 | #include "rsrc.h" |
f9ead18c JA |
19 | |
20 | #if defined(CONFIG_NET) | |
21 | struct io_shutdown { | |
22 | struct file *file; | |
23 | int how; | |
24 | }; | |
25 | ||
26 | struct io_accept { | |
27 | struct file *file; | |
28 | struct sockaddr __user *addr; | |
29 | int __user *addr_len; | |
30 | int flags; | |
31 | u32 file_slot; | |
32 | unsigned long nofile; | |
33 | }; | |
34 | ||
35 | struct io_socket { | |
36 | struct file *file; | |
37 | int domain; | |
38 | int type; | |
39 | int protocol; | |
40 | int flags; | |
41 | u32 file_slot; | |
42 | unsigned long nofile; | |
43 | }; | |
44 | ||
45 | struct io_connect { | |
46 | struct file *file; | |
47 | struct sockaddr __user *addr; | |
48 | int addr_len; | |
3fb1bd68 | 49 | bool in_progress; |
f9ead18c JA |
50 | }; |
51 | ||
52 | struct io_sr_msg { | |
53 | struct file *file; | |
54 | union { | |
55 | struct compat_msghdr __user *umsg_compat; | |
56 | struct user_msghdr __user *umsg; | |
57 | void __user *buf; | |
58 | }; | |
0b048557 PB |
59 | unsigned len; |
60 | unsigned done_io; | |
293402e5 | 61 | unsigned msg_flags; |
0b048557 | 62 | u16 flags; |
516e82f0 | 63 | /* initialised and used only by !msg send variants */ |
0b048557 | 64 | u16 addr_len; |
b00c51ef | 65 | u16 buf_group; |
092aeedb | 66 | void __user *addr; |
516e82f0 | 67 | /* used only for send zerocopy */ |
b48c312b | 68 | struct io_kiocb *notif; |
06a5464b PB |
69 | }; |
70 | ||
17add5ce PB |
71 | static inline bool io_check_multishot(struct io_kiocb *req, |
72 | unsigned int issue_flags) | |
73 | { | |
74 | /* | |
75 | * When ->locked_cq is set we only allow to post CQEs from the original | |
76 | * task context. Usual request completions will be handled in other | |
77 | * generic paths but multipoll may decide to post extra cqes. | |
78 | */ | |
79 | return !(issue_flags & IO_URING_F_IOWQ) || | |
80 | !(issue_flags & IO_URING_F_MULTISHOT) || | |
81 | !req->ctx->task_complete; | |
82 | } | |
83 | ||
f9ead18c JA |
84 | int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
85 | { | |
f2ccb5ae | 86 | struct io_shutdown *shutdown = io_kiocb_to_cmd(req, struct io_shutdown); |
f9ead18c JA |
87 | |
88 | if (unlikely(sqe->off || sqe->addr || sqe->rw_flags || | |
89 | sqe->buf_index || sqe->splice_fd_in)) | |
90 | return -EINVAL; | |
91 | ||
92 | shutdown->how = READ_ONCE(sqe->len); | |
93 | return 0; | |
94 | } | |
95 | ||
96 | int io_shutdown(struct io_kiocb *req, unsigned int issue_flags) | |
97 | { | |
f2ccb5ae | 98 | struct io_shutdown *shutdown = io_kiocb_to_cmd(req, struct io_shutdown); |
f9ead18c JA |
99 | struct socket *sock; |
100 | int ret; | |
101 | ||
102 | if (issue_flags & IO_URING_F_NONBLOCK) | |
103 | return -EAGAIN; | |
104 | ||
105 | sock = sock_from_file(req->file); | |
106 | if (unlikely(!sock)) | |
107 | return -ENOTSOCK; | |
108 | ||
109 | ret = __sys_shutdown_sock(sock, shutdown->how); | |
110 | io_req_set_res(req, ret, 0); | |
111 | return IOU_OK; | |
112 | } | |
113 | ||
114 | static bool io_net_retry(struct socket *sock, int flags) | |
115 | { | |
116 | if (!(flags & MSG_WAITALL)) | |
117 | return false; | |
118 | return sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET; | |
119 | } | |
120 | ||
43e0bbbd JA |
121 | static void io_netmsg_recycle(struct io_kiocb *req, unsigned int issue_flags) |
122 | { | |
123 | struct io_async_msghdr *hdr = req->async_data; | |
124 | ||
06360426 | 125 | if (!req_has_async_data(req) || issue_flags & IO_URING_F_UNLOCKED) |
43e0bbbd JA |
126 | return; |
127 | ||
128 | /* Let normal cleanup path reap it if we fail adding to the cache */ | |
129 | if (io_alloc_cache_put(&req->ctx->netmsg_cache, &hdr->cache)) { | |
130 | req->async_data = NULL; | |
131 | req->flags &= ~REQ_F_ASYNC_DATA; | |
132 | } | |
133 | } | |
134 | ||
858c293e PB |
135 | static struct io_async_msghdr *io_msg_alloc_async(struct io_kiocb *req, |
136 | unsigned int issue_flags) | |
43e0bbbd JA |
137 | { |
138 | struct io_ring_ctx *ctx = req->ctx; | |
139 | struct io_cache_entry *entry; | |
4c17a496 | 140 | struct io_async_msghdr *hdr; |
43e0bbbd | 141 | |
df730ec2 XL |
142 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { |
143 | entry = io_alloc_cache_get(&ctx->netmsg_cache); | |
144 | if (entry) { | |
145 | hdr = container_of(entry, struct io_async_msghdr, cache); | |
146 | hdr->free_iov = NULL; | |
147 | req->flags |= REQ_F_ASYNC_DATA; | |
148 | req->async_data = hdr; | |
149 | return hdr; | |
150 | } | |
43e0bbbd JA |
151 | } |
152 | ||
4c17a496 PB |
153 | if (!io_alloc_async_data(req)) { |
154 | hdr = req->async_data; | |
155 | hdr->free_iov = NULL; | |
156 | return hdr; | |
157 | } | |
43e0bbbd JA |
158 | return NULL; |
159 | } | |
160 | ||
858c293e PB |
161 | static inline struct io_async_msghdr *io_msg_alloc_async_prep(struct io_kiocb *req) |
162 | { | |
163 | /* ->prep_async is always called from the submission context */ | |
164 | return io_msg_alloc_async(req, 0); | |
165 | } | |
166 | ||
f9ead18c | 167 | static int io_setup_async_msg(struct io_kiocb *req, |
43e0bbbd JA |
168 | struct io_async_msghdr *kmsg, |
169 | unsigned int issue_flags) | |
f9ead18c | 170 | { |
3f743e9b | 171 | struct io_async_msghdr *async_msg; |
f9ead18c | 172 | |
3f743e9b | 173 | if (req_has_async_data(req)) |
f9ead18c | 174 | return -EAGAIN; |
858c293e | 175 | async_msg = io_msg_alloc_async(req, issue_flags); |
43e0bbbd | 176 | if (!async_msg) { |
f9ead18c JA |
177 | kfree(kmsg->free_iov); |
178 | return -ENOMEM; | |
179 | } | |
f9ead18c JA |
180 | req->flags |= REQ_F_NEED_CLEANUP; |
181 | memcpy(async_msg, kmsg, sizeof(*kmsg)); | |
6f10ae8a PB |
182 | if (async_msg->msg.msg_name) |
183 | async_msg->msg.msg_name = &async_msg->addr; | |
f9ead18c | 184 | /* if were using fast_iov, set it to the new one */ |
3e4cb6eb SM |
185 | if (!kmsg->free_iov) { |
186 | size_t fast_idx = kmsg->msg.msg_iter.iov - kmsg->fast_iov; | |
187 | async_msg->msg.msg_iter.iov = &async_msg->fast_iov[fast_idx]; | |
188 | } | |
f9ead18c JA |
189 | |
190 | return -EAGAIN; | |
191 | } | |
192 | ||
193 | static int io_sendmsg_copy_hdr(struct io_kiocb *req, | |
194 | struct io_async_msghdr *iomsg) | |
195 | { | |
f2ccb5ae | 196 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
197 | |
198 | iomsg->msg.msg_name = &iomsg->addr; | |
199 | iomsg->free_iov = iomsg->fast_iov; | |
200 | return sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags, | |
201 | &iomsg->free_iov); | |
202 | } | |
203 | ||
516e82f0 | 204 | int io_send_prep_async(struct io_kiocb *req) |
581711c4 | 205 | { |
ac9e5784 | 206 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
581711c4 PB |
207 | struct io_async_msghdr *io; |
208 | int ret; | |
209 | ||
210 | if (!zc->addr || req_has_async_data(req)) | |
211 | return 0; | |
6bf8ad25 PB |
212 | io = io_msg_alloc_async_prep(req); |
213 | if (!io) | |
581711c4 | 214 | return -ENOMEM; |
581711c4 PB |
215 | ret = move_addr_to_kernel(zc->addr, zc->addr_len, &io->addr); |
216 | return ret; | |
217 | } | |
218 | ||
219 | static int io_setup_async_addr(struct io_kiocb *req, | |
6ae61b7a | 220 | struct sockaddr_storage *addr_storage, |
581711c4 PB |
221 | unsigned int issue_flags) |
222 | { | |
6ae61b7a | 223 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
581711c4 PB |
224 | struct io_async_msghdr *io; |
225 | ||
6ae61b7a | 226 | if (!sr->addr || req_has_async_data(req)) |
581711c4 | 227 | return -EAGAIN; |
6bf8ad25 PB |
228 | io = io_msg_alloc_async(req, issue_flags); |
229 | if (!io) | |
581711c4 | 230 | return -ENOMEM; |
6ae61b7a | 231 | memcpy(&io->addr, addr_storage, sizeof(io->addr)); |
581711c4 PB |
232 | return -EAGAIN; |
233 | } | |
234 | ||
f9ead18c JA |
235 | int io_sendmsg_prep_async(struct io_kiocb *req) |
236 | { | |
237 | int ret; | |
238 | ||
858c293e PB |
239 | if (!io_msg_alloc_async_prep(req)) |
240 | return -ENOMEM; | |
f9ead18c JA |
241 | ret = io_sendmsg_copy_hdr(req, req->async_data); |
242 | if (!ret) | |
243 | req->flags |= REQ_F_NEED_CLEANUP; | |
244 | return ret; | |
245 | } | |
246 | ||
247 | void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req) | |
248 | { | |
249 | struct io_async_msghdr *io = req->async_data; | |
250 | ||
251 | kfree(io->free_iov); | |
252 | } | |
253 | ||
254 | int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
255 | { | |
f2ccb5ae | 256 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c | 257 | |
516e82f0 PB |
258 | if (req->opcode == IORING_OP_SEND) { |
259 | if (READ_ONCE(sqe->__pad3[0])) | |
260 | return -EINVAL; | |
261 | sr->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
262 | sr->addr_len = READ_ONCE(sqe->addr_len); | |
263 | } else if (sqe->addr2 || sqe->file_index) { | |
f9ead18c | 264 | return -EINVAL; |
516e82f0 | 265 | } |
f9ead18c JA |
266 | |
267 | sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
268 | sr->len = READ_ONCE(sqe->len); | |
269 | sr->flags = READ_ONCE(sqe->ioprio); | |
270 | if (sr->flags & ~IORING_RECVSEND_POLL_FIRST) | |
271 | return -EINVAL; | |
272 | sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
273 | if (sr->msg_flags & MSG_DONTWAIT) | |
274 | req->flags |= REQ_F_NOWAIT; | |
275 | ||
276 | #ifdef CONFIG_COMPAT | |
277 | if (req->ctx->compat) | |
278 | sr->msg_flags |= MSG_CMSG_COMPAT; | |
279 | #endif | |
280 | sr->done_io = 0; | |
281 | return 0; | |
282 | } | |
283 | ||
284 | int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags) | |
285 | { | |
f2ccb5ae | 286 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
287 | struct io_async_msghdr iomsg, *kmsg; |
288 | struct socket *sock; | |
289 | unsigned flags; | |
290 | int min_ret = 0; | |
291 | int ret; | |
292 | ||
293 | sock = sock_from_file(req->file); | |
294 | if (unlikely(!sock)) | |
295 | return -ENOTSOCK; | |
296 | ||
297 | if (req_has_async_data(req)) { | |
298 | kmsg = req->async_data; | |
299 | } else { | |
300 | ret = io_sendmsg_copy_hdr(req, &iomsg); | |
301 | if (ret) | |
302 | return ret; | |
303 | kmsg = &iomsg; | |
304 | } | |
305 | ||
306 | if (!(req->flags & REQ_F_POLLED) && | |
307 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
43e0bbbd | 308 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c JA |
309 | |
310 | flags = sr->msg_flags; | |
311 | if (issue_flags & IO_URING_F_NONBLOCK) | |
312 | flags |= MSG_DONTWAIT; | |
313 | if (flags & MSG_WAITALL) | |
314 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
315 | ||
316 | ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); | |
317 | ||
318 | if (ret < min_ret) { | |
319 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
43e0bbbd | 320 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c JA |
321 | if (ret > 0 && io_net_retry(sock, flags)) { |
322 | sr->done_io += ret; | |
323 | req->flags |= REQ_F_PARTIAL_IO; | |
43e0bbbd | 324 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 325 | } |
95eafc74 PB |
326 | if (ret == -ERESTARTSYS) |
327 | ret = -EINTR; | |
f9ead18c JA |
328 | req_set_fail(req); |
329 | } | |
330 | /* fast path, check for non-NULL to avoid function call */ | |
331 | if (kmsg->free_iov) | |
332 | kfree(kmsg->free_iov); | |
333 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
43e0bbbd | 334 | io_netmsg_recycle(req, issue_flags); |
f9ead18c JA |
335 | if (ret >= 0) |
336 | ret += sr->done_io; | |
337 | else if (sr->done_io) | |
338 | ret = sr->done_io; | |
339 | io_req_set_res(req, ret, 0); | |
340 | return IOU_OK; | |
341 | } | |
342 | ||
343 | int io_send(struct io_kiocb *req, unsigned int issue_flags) | |
344 | { | |
516e82f0 | 345 | struct sockaddr_storage __address; |
f2ccb5ae | 346 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
347 | struct msghdr msg; |
348 | struct iovec iov; | |
349 | struct socket *sock; | |
350 | unsigned flags; | |
351 | int min_ret = 0; | |
352 | int ret; | |
353 | ||
04360d3e PB |
354 | msg.msg_name = NULL; |
355 | msg.msg_control = NULL; | |
356 | msg.msg_controllen = 0; | |
357 | msg.msg_namelen = 0; | |
358 | msg.msg_ubuf = NULL; | |
359 | ||
516e82f0 PB |
360 | if (sr->addr) { |
361 | if (req_has_async_data(req)) { | |
362 | struct io_async_msghdr *io = req->async_data; | |
363 | ||
364 | msg.msg_name = &io->addr; | |
365 | } else { | |
366 | ret = move_addr_to_kernel(sr->addr, sr->addr_len, &__address); | |
367 | if (unlikely(ret < 0)) | |
368 | return ret; | |
369 | msg.msg_name = (struct sockaddr *)&__address; | |
370 | } | |
371 | msg.msg_namelen = sr->addr_len; | |
372 | } | |
373 | ||
f9ead18c JA |
374 | if (!(req->flags & REQ_F_POLLED) && |
375 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
516e82f0 | 376 | return io_setup_async_addr(req, &__address, issue_flags); |
f9ead18c JA |
377 | |
378 | sock = sock_from_file(req->file); | |
379 | if (unlikely(!sock)) | |
380 | return -ENOTSOCK; | |
381 | ||
de4eda9d | 382 | ret = import_single_range(ITER_SOURCE, sr->buf, sr->len, &iov, &msg.msg_iter); |
f9ead18c JA |
383 | if (unlikely(ret)) |
384 | return ret; | |
385 | ||
f9ead18c JA |
386 | flags = sr->msg_flags; |
387 | if (issue_flags & IO_URING_F_NONBLOCK) | |
388 | flags |= MSG_DONTWAIT; | |
389 | if (flags & MSG_WAITALL) | |
390 | min_ret = iov_iter_count(&msg.msg_iter); | |
391 | ||
392 | msg.msg_flags = flags; | |
393 | ret = sock_sendmsg(sock, &msg); | |
394 | if (ret < min_ret) { | |
395 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
516e82f0 PB |
396 | return io_setup_async_addr(req, &__address, issue_flags); |
397 | ||
f9ead18c JA |
398 | if (ret > 0 && io_net_retry(sock, flags)) { |
399 | sr->len -= ret; | |
400 | sr->buf += ret; | |
401 | sr->done_io += ret; | |
402 | req->flags |= REQ_F_PARTIAL_IO; | |
516e82f0 | 403 | return io_setup_async_addr(req, &__address, issue_flags); |
f9ead18c | 404 | } |
95eafc74 PB |
405 | if (ret == -ERESTARTSYS) |
406 | ret = -EINTR; | |
f9ead18c JA |
407 | req_set_fail(req); |
408 | } | |
409 | if (ret >= 0) | |
410 | ret += sr->done_io; | |
411 | else if (sr->done_io) | |
412 | ret = sr->done_io; | |
413 | io_req_set_res(req, ret, 0); | |
414 | return IOU_OK; | |
415 | } | |
416 | ||
9bb66906 DY |
417 | static bool io_recvmsg_multishot_overflow(struct io_async_msghdr *iomsg) |
418 | { | |
9b0fc3c0 | 419 | int hdr; |
9bb66906 | 420 | |
9b0fc3c0 | 421 | if (iomsg->namelen < 0) |
9bb66906 | 422 | return true; |
9b0fc3c0 DY |
423 | if (check_add_overflow((int)sizeof(struct io_uring_recvmsg_out), |
424 | iomsg->namelen, &hdr)) | |
9bb66906 | 425 | return true; |
9b0fc3c0 | 426 | if (check_add_overflow(hdr, (int)iomsg->controllen, &hdr)) |
9bb66906 DY |
427 | return true; |
428 | ||
429 | return false; | |
430 | } | |
431 | ||
f9ead18c JA |
432 | static int __io_recvmsg_copy_hdr(struct io_kiocb *req, |
433 | struct io_async_msghdr *iomsg) | |
434 | { | |
f2ccb5ae | 435 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
7fa875b8 | 436 | struct user_msghdr msg; |
f9ead18c JA |
437 | int ret; |
438 | ||
7fa875b8 DY |
439 | if (copy_from_user(&msg, sr->umsg, sizeof(*sr->umsg))) |
440 | return -EFAULT; | |
441 | ||
442 | ret = __copy_msghdr(&iomsg->msg, &msg, &iomsg->uaddr); | |
f9ead18c JA |
443 | if (ret) |
444 | return ret; | |
445 | ||
446 | if (req->flags & REQ_F_BUFFER_SELECT) { | |
7fa875b8 | 447 | if (msg.msg_iovlen == 0) { |
5702196e DY |
448 | sr->len = iomsg->fast_iov[0].iov_len = 0; |
449 | iomsg->fast_iov[0].iov_base = NULL; | |
450 | iomsg->free_iov = NULL; | |
7fa875b8 | 451 | } else if (msg.msg_iovlen > 1) { |
f9ead18c | 452 | return -EINVAL; |
5702196e | 453 | } else { |
7fa875b8 | 454 | if (copy_from_user(iomsg->fast_iov, msg.msg_iov, sizeof(*msg.msg_iov))) |
5702196e DY |
455 | return -EFAULT; |
456 | sr->len = iomsg->fast_iov[0].iov_len; | |
457 | iomsg->free_iov = NULL; | |
458 | } | |
9bb66906 DY |
459 | |
460 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
461 | iomsg->namelen = msg.msg_namelen; | |
462 | iomsg->controllen = msg.msg_controllen; | |
463 | if (io_recvmsg_multishot_overflow(iomsg)) | |
464 | return -EOVERFLOW; | |
465 | } | |
f9ead18c JA |
466 | } else { |
467 | iomsg->free_iov = iomsg->fast_iov; | |
de4eda9d | 468 | ret = __import_iovec(ITER_DEST, msg.msg_iov, msg.msg_iovlen, UIO_FASTIOV, |
f9ead18c JA |
469 | &iomsg->free_iov, &iomsg->msg.msg_iter, |
470 | false); | |
471 | if (ret > 0) | |
472 | ret = 0; | |
473 | } | |
474 | ||
475 | return ret; | |
476 | } | |
477 | ||
478 | #ifdef CONFIG_COMPAT | |
479 | static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req, | |
480 | struct io_async_msghdr *iomsg) | |
481 | { | |
f2ccb5ae | 482 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
72c531f8 | 483 | struct compat_msghdr msg; |
f9ead18c | 484 | struct compat_iovec __user *uiov; |
f9ead18c JA |
485 | int ret; |
486 | ||
72c531f8 DY |
487 | if (copy_from_user(&msg, sr->umsg_compat, sizeof(msg))) |
488 | return -EFAULT; | |
489 | ||
4f6a94d3 | 490 | ret = __get_compat_msghdr(&iomsg->msg, &msg, &iomsg->uaddr); |
f9ead18c JA |
491 | if (ret) |
492 | return ret; | |
493 | ||
72c531f8 | 494 | uiov = compat_ptr(msg.msg_iov); |
f9ead18c JA |
495 | if (req->flags & REQ_F_BUFFER_SELECT) { |
496 | compat_ssize_t clen; | |
497 | ||
990a4de5 | 498 | iomsg->free_iov = NULL; |
72c531f8 | 499 | if (msg.msg_iovlen == 0) { |
6d2f75a0 | 500 | sr->len = 0; |
72c531f8 | 501 | } else if (msg.msg_iovlen > 1) { |
f9ead18c | 502 | return -EINVAL; |
6d2f75a0 DY |
503 | } else { |
504 | if (!access_ok(uiov, sizeof(*uiov))) | |
505 | return -EFAULT; | |
506 | if (__get_user(clen, &uiov->iov_len)) | |
507 | return -EFAULT; | |
508 | if (clen < 0) | |
509 | return -EINVAL; | |
510 | sr->len = clen; | |
6d2f75a0 | 511 | } |
9bb66906 DY |
512 | |
513 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
514 | iomsg->namelen = msg.msg_namelen; | |
515 | iomsg->controllen = msg.msg_controllen; | |
516 | if (io_recvmsg_multishot_overflow(iomsg)) | |
517 | return -EOVERFLOW; | |
518 | } | |
f9ead18c JA |
519 | } else { |
520 | iomsg->free_iov = iomsg->fast_iov; | |
de4eda9d | 521 | ret = __import_iovec(ITER_DEST, (struct iovec __user *)uiov, msg.msg_iovlen, |
f9ead18c JA |
522 | UIO_FASTIOV, &iomsg->free_iov, |
523 | &iomsg->msg.msg_iter, true); | |
524 | if (ret < 0) | |
525 | return ret; | |
526 | } | |
527 | ||
528 | return 0; | |
529 | } | |
530 | #endif | |
531 | ||
532 | static int io_recvmsg_copy_hdr(struct io_kiocb *req, | |
533 | struct io_async_msghdr *iomsg) | |
534 | { | |
535 | iomsg->msg.msg_name = &iomsg->addr; | |
536 | ||
537 | #ifdef CONFIG_COMPAT | |
538 | if (req->ctx->compat) | |
539 | return __io_compat_recvmsg_copy_hdr(req, iomsg); | |
540 | #endif | |
541 | ||
542 | return __io_recvmsg_copy_hdr(req, iomsg); | |
543 | } | |
544 | ||
545 | int io_recvmsg_prep_async(struct io_kiocb *req) | |
546 | { | |
547 | int ret; | |
548 | ||
858c293e PB |
549 | if (!io_msg_alloc_async_prep(req)) |
550 | return -ENOMEM; | |
f9ead18c JA |
551 | ret = io_recvmsg_copy_hdr(req, req->async_data); |
552 | if (!ret) | |
553 | req->flags |= REQ_F_NEED_CLEANUP; | |
554 | return ret; | |
555 | } | |
556 | ||
b3fdea6e DY |
557 | #define RECVMSG_FLAGS (IORING_RECVSEND_POLL_FIRST | IORING_RECV_MULTISHOT) |
558 | ||
f9ead18c JA |
559 | int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
560 | { | |
f2ccb5ae | 561 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
562 | |
563 | if (unlikely(sqe->file_index || sqe->addr2)) | |
564 | return -EINVAL; | |
565 | ||
566 | sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
567 | sr->len = READ_ONCE(sqe->len); | |
568 | sr->flags = READ_ONCE(sqe->ioprio); | |
b3fdea6e | 569 | if (sr->flags & ~(RECVMSG_FLAGS)) |
f9ead18c JA |
570 | return -EINVAL; |
571 | sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
572 | if (sr->msg_flags & MSG_DONTWAIT) | |
573 | req->flags |= REQ_F_NOWAIT; | |
574 | if (sr->msg_flags & MSG_ERRQUEUE) | |
575 | req->flags |= REQ_F_CLEAR_POLLIN; | |
b3fdea6e DY |
576 | if (sr->flags & IORING_RECV_MULTISHOT) { |
577 | if (!(req->flags & REQ_F_BUFFER_SELECT)) | |
578 | return -EINVAL; | |
579 | if (sr->msg_flags & MSG_WAITALL) | |
580 | return -EINVAL; | |
581 | if (req->opcode == IORING_OP_RECV && sr->len) | |
582 | return -EINVAL; | |
583 | req->flags |= REQ_F_APOLL_MULTISHOT; | |
b00c51ef JA |
584 | /* |
585 | * Store the buffer group for this multishot receive separately, | |
586 | * as if we end up doing an io-wq based issue that selects a | |
587 | * buffer, it has to be committed immediately and that will | |
588 | * clear ->buf_list. This means we lose the link to the buffer | |
589 | * list, and the eventual buffer put on completion then cannot | |
590 | * restore it. | |
591 | */ | |
592 | sr->buf_group = req->buf_index; | |
b3fdea6e | 593 | } |
f9ead18c JA |
594 | |
595 | #ifdef CONFIG_COMPAT | |
596 | if (req->ctx->compat) | |
597 | sr->msg_flags |= MSG_CMSG_COMPAT; | |
598 | #endif | |
599 | sr->done_io = 0; | |
600 | return 0; | |
601 | } | |
602 | ||
b3fdea6e DY |
603 | static inline void io_recv_prep_retry(struct io_kiocb *req) |
604 | { | |
f2ccb5ae | 605 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
b3fdea6e DY |
606 | |
607 | sr->done_io = 0; | |
608 | sr->len = 0; /* get from the provided buffer */ | |
b00c51ef | 609 | req->buf_index = sr->buf_group; |
b3fdea6e DY |
610 | } |
611 | ||
612 | /* | |
9bb66906 | 613 | * Finishes io_recv and io_recvmsg. |
b3fdea6e DY |
614 | * |
615 | * Returns true if it is actually finished, or false if it should run | |
616 | * again (for multishot). | |
617 | */ | |
9bb66906 | 618 | static inline bool io_recv_finish(struct io_kiocb *req, int *ret, |
100d6b17 PB |
619 | unsigned int cflags, bool mshot_finished, |
620 | unsigned issue_flags) | |
b3fdea6e DY |
621 | { |
622 | if (!(req->flags & REQ_F_APOLL_MULTISHOT)) { | |
623 | io_req_set_res(req, *ret, cflags); | |
624 | *ret = IOU_OK; | |
625 | return true; | |
626 | } | |
627 | ||
9bb66906 | 628 | if (!mshot_finished) { |
9b8c5475 DY |
629 | if (io_aux_cqe(req->ctx, issue_flags & IO_URING_F_COMPLETE_DEFER, |
630 | req->cqe.user_data, *ret, cflags | IORING_CQE_F_MORE, true)) { | |
b3fdea6e DY |
631 | io_recv_prep_retry(req); |
632 | return false; | |
633 | } | |
e2ad599d | 634 | /* Otherwise stop multishot but use the current result. */ |
b3fdea6e DY |
635 | } |
636 | ||
637 | io_req_set_res(req, *ret, cflags); | |
638 | ||
100d6b17 | 639 | if (issue_flags & IO_URING_F_MULTISHOT) |
b3fdea6e | 640 | *ret = IOU_STOP_MULTISHOT; |
e2df2ccb DY |
641 | else |
642 | *ret = IOU_OK; | |
b3fdea6e DY |
643 | return true; |
644 | } | |
645 | ||
9bb66906 DY |
646 | static int io_recvmsg_prep_multishot(struct io_async_msghdr *kmsg, |
647 | struct io_sr_msg *sr, void __user **buf, | |
648 | size_t *len) | |
649 | { | |
650 | unsigned long ubuf = (unsigned long) *buf; | |
651 | unsigned long hdr; | |
652 | ||
653 | hdr = sizeof(struct io_uring_recvmsg_out) + kmsg->namelen + | |
654 | kmsg->controllen; | |
655 | if (*len < hdr) | |
656 | return -EFAULT; | |
657 | ||
658 | if (kmsg->controllen) { | |
659 | unsigned long control = ubuf + hdr - kmsg->controllen; | |
660 | ||
d1f6222c | 661 | kmsg->msg.msg_control_user = (void __user *) control; |
9bb66906 DY |
662 | kmsg->msg.msg_controllen = kmsg->controllen; |
663 | } | |
664 | ||
665 | sr->buf = *buf; /* stash for later copy */ | |
d1f6222c | 666 | *buf = (void __user *) (ubuf + hdr); |
9bb66906 DY |
667 | kmsg->payloadlen = *len = *len - hdr; |
668 | return 0; | |
669 | } | |
670 | ||
671 | struct io_recvmsg_multishot_hdr { | |
672 | struct io_uring_recvmsg_out msg; | |
673 | struct sockaddr_storage addr; | |
674 | }; | |
675 | ||
676 | static int io_recvmsg_multishot(struct socket *sock, struct io_sr_msg *io, | |
677 | struct io_async_msghdr *kmsg, | |
678 | unsigned int flags, bool *finished) | |
679 | { | |
680 | int err; | |
681 | int copy_len; | |
682 | struct io_recvmsg_multishot_hdr hdr; | |
683 | ||
684 | if (kmsg->namelen) | |
685 | kmsg->msg.msg_name = &hdr.addr; | |
686 | kmsg->msg.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
687 | kmsg->msg.msg_namelen = 0; | |
688 | ||
689 | if (sock->file->f_flags & O_NONBLOCK) | |
690 | flags |= MSG_DONTWAIT; | |
691 | ||
692 | err = sock_recvmsg(sock, &kmsg->msg, flags); | |
693 | *finished = err <= 0; | |
694 | if (err < 0) | |
695 | return err; | |
696 | ||
697 | hdr.msg = (struct io_uring_recvmsg_out) { | |
698 | .controllen = kmsg->controllen - kmsg->msg.msg_controllen, | |
699 | .flags = kmsg->msg.msg_flags & ~MSG_CMSG_COMPAT | |
700 | }; | |
701 | ||
702 | hdr.msg.payloadlen = err; | |
703 | if (err > kmsg->payloadlen) | |
704 | err = kmsg->payloadlen; | |
705 | ||
706 | copy_len = sizeof(struct io_uring_recvmsg_out); | |
707 | if (kmsg->msg.msg_namelen > kmsg->namelen) | |
708 | copy_len += kmsg->namelen; | |
709 | else | |
710 | copy_len += kmsg->msg.msg_namelen; | |
711 | ||
712 | /* | |
713 | * "fromlen shall refer to the value before truncation.." | |
714 | * 1003.1g | |
715 | */ | |
716 | hdr.msg.namelen = kmsg->msg.msg_namelen; | |
717 | ||
718 | /* ensure that there is no gap between hdr and sockaddr_storage */ | |
719 | BUILD_BUG_ON(offsetof(struct io_recvmsg_multishot_hdr, addr) != | |
720 | sizeof(struct io_uring_recvmsg_out)); | |
721 | if (copy_to_user(io->buf, &hdr, copy_len)) { | |
722 | *finished = true; | |
723 | return -EFAULT; | |
724 | } | |
725 | ||
726 | return sizeof(struct io_uring_recvmsg_out) + kmsg->namelen + | |
727 | kmsg->controllen + err; | |
728 | } | |
729 | ||
f9ead18c JA |
730 | int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags) |
731 | { | |
f2ccb5ae | 732 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
733 | struct io_async_msghdr iomsg, *kmsg; |
734 | struct socket *sock; | |
735 | unsigned int cflags; | |
736 | unsigned flags; | |
737 | int ret, min_ret = 0; | |
738 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
9bb66906 | 739 | bool mshot_finished = true; |
f9ead18c JA |
740 | |
741 | sock = sock_from_file(req->file); | |
742 | if (unlikely(!sock)) | |
743 | return -ENOTSOCK; | |
744 | ||
745 | if (req_has_async_data(req)) { | |
746 | kmsg = req->async_data; | |
747 | } else { | |
748 | ret = io_recvmsg_copy_hdr(req, &iomsg); | |
749 | if (ret) | |
750 | return ret; | |
751 | kmsg = &iomsg; | |
752 | } | |
753 | ||
754 | if (!(req->flags & REQ_F_POLLED) && | |
755 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
43e0bbbd | 756 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 757 | |
17add5ce PB |
758 | if (!io_check_multishot(req, issue_flags)) |
759 | return io_setup_async_msg(req, kmsg, issue_flags); | |
760 | ||
9bb66906 | 761 | retry_multishot: |
f9ead18c JA |
762 | if (io_do_buffer_select(req)) { |
763 | void __user *buf; | |
9bb66906 | 764 | size_t len = sr->len; |
f9ead18c | 765 | |
9bb66906 | 766 | buf = io_buffer_select(req, &len, issue_flags); |
f9ead18c JA |
767 | if (!buf) |
768 | return -ENOBUFS; | |
9bb66906 DY |
769 | |
770 | if (req->flags & REQ_F_APOLL_MULTISHOT) { | |
771 | ret = io_recvmsg_prep_multishot(kmsg, sr, &buf, &len); | |
772 | if (ret) { | |
773 | io_kbuf_recycle(req, issue_flags); | |
774 | return ret; | |
775 | } | |
776 | } | |
777 | ||
f9ead18c | 778 | kmsg->fast_iov[0].iov_base = buf; |
9bb66906 | 779 | kmsg->fast_iov[0].iov_len = len; |
de4eda9d | 780 | iov_iter_init(&kmsg->msg.msg_iter, ITER_DEST, kmsg->fast_iov, 1, |
9bb66906 | 781 | len); |
f9ead18c JA |
782 | } |
783 | ||
784 | flags = sr->msg_flags; | |
785 | if (force_nonblock) | |
786 | flags |= MSG_DONTWAIT; | |
787 | if (flags & MSG_WAITALL) | |
788 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
789 | ||
790 | kmsg->msg.msg_get_inq = 1; | |
9bb66906 DY |
791 | if (req->flags & REQ_F_APOLL_MULTISHOT) |
792 | ret = io_recvmsg_multishot(sock, sr, kmsg, flags, | |
793 | &mshot_finished); | |
794 | else | |
795 | ret = __sys_recvmsg_sock(sock, &kmsg->msg, sr->umsg, | |
796 | kmsg->uaddr, flags); | |
797 | ||
f9ead18c | 798 | if (ret < min_ret) { |
9bb66906 DY |
799 | if (ret == -EAGAIN && force_nonblock) { |
800 | ret = io_setup_async_msg(req, kmsg, issue_flags); | |
100d6b17 | 801 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_MULTISHOT)) { |
9bb66906 DY |
802 | io_kbuf_recycle(req, issue_flags); |
803 | return IOU_ISSUE_SKIP_COMPLETE; | |
804 | } | |
805 | return ret; | |
806 | } | |
f9ead18c JA |
807 | if (ret > 0 && io_net_retry(sock, flags)) { |
808 | sr->done_io += ret; | |
809 | req->flags |= REQ_F_PARTIAL_IO; | |
43e0bbbd | 810 | return io_setup_async_msg(req, kmsg, issue_flags); |
f9ead18c | 811 | } |
95eafc74 PB |
812 | if (ret == -ERESTARTSYS) |
813 | ret = -EINTR; | |
f9ead18c JA |
814 | req_set_fail(req); |
815 | } else if ((flags & MSG_WAITALL) && (kmsg->msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { | |
816 | req_set_fail(req); | |
817 | } | |
818 | ||
d4e097da | 819 | if (ret > 0) |
f9ead18c JA |
820 | ret += sr->done_io; |
821 | else if (sr->done_io) | |
822 | ret = sr->done_io; | |
d4e097da DY |
823 | else |
824 | io_kbuf_recycle(req, issue_flags); | |
825 | ||
f9ead18c JA |
826 | cflags = io_put_kbuf(req, issue_flags); |
827 | if (kmsg->msg.msg_inq) | |
828 | cflags |= IORING_CQE_F_SOCK_NONEMPTY; | |
b3fdea6e | 829 | |
100d6b17 | 830 | if (!io_recv_finish(req, &ret, cflags, mshot_finished, issue_flags)) |
9bb66906 DY |
831 | goto retry_multishot; |
832 | ||
833 | if (mshot_finished) { | |
9bb66906 DY |
834 | /* fast path, check for non-NULL to avoid function call */ |
835 | if (kmsg->free_iov) | |
836 | kfree(kmsg->free_iov); | |
6c3e8955 | 837 | io_netmsg_recycle(req, issue_flags); |
9bb66906 DY |
838 | req->flags &= ~REQ_F_NEED_CLEANUP; |
839 | } | |
840 | ||
841 | return ret; | |
f9ead18c JA |
842 | } |
843 | ||
844 | int io_recv(struct io_kiocb *req, unsigned int issue_flags) | |
845 | { | |
f2ccb5ae | 846 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); |
f9ead18c JA |
847 | struct msghdr msg; |
848 | struct socket *sock; | |
849 | struct iovec iov; | |
850 | unsigned int cflags; | |
851 | unsigned flags; | |
852 | int ret, min_ret = 0; | |
853 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
b3fdea6e | 854 | size_t len = sr->len; |
f9ead18c JA |
855 | |
856 | if (!(req->flags & REQ_F_POLLED) && | |
857 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
858 | return -EAGAIN; | |
859 | ||
17add5ce PB |
860 | if (!io_check_multishot(req, issue_flags)) |
861 | return -EAGAIN; | |
862 | ||
f9ead18c JA |
863 | sock = sock_from_file(req->file); |
864 | if (unlikely(!sock)) | |
865 | return -ENOTSOCK; | |
866 | ||
b3fdea6e | 867 | retry_multishot: |
f9ead18c JA |
868 | if (io_do_buffer_select(req)) { |
869 | void __user *buf; | |
870 | ||
b3fdea6e | 871 | buf = io_buffer_select(req, &len, issue_flags); |
f9ead18c JA |
872 | if (!buf) |
873 | return -ENOBUFS; | |
874 | sr->buf = buf; | |
875 | } | |
876 | ||
de4eda9d | 877 | ret = import_single_range(ITER_DEST, sr->buf, len, &iov, &msg.msg_iter); |
f9ead18c JA |
878 | if (unlikely(ret)) |
879 | goto out_free; | |
880 | ||
881 | msg.msg_name = NULL; | |
882 | msg.msg_namelen = 0; | |
883 | msg.msg_control = NULL; | |
884 | msg.msg_get_inq = 1; | |
885 | msg.msg_flags = 0; | |
886 | msg.msg_controllen = 0; | |
887 | msg.msg_iocb = NULL; | |
e02b6651 | 888 | msg.msg_ubuf = NULL; |
f9ead18c JA |
889 | |
890 | flags = sr->msg_flags; | |
891 | if (force_nonblock) | |
892 | flags |= MSG_DONTWAIT; | |
893 | if (flags & MSG_WAITALL) | |
894 | min_ret = iov_iter_count(&msg.msg_iter); | |
895 | ||
896 | ret = sock_recvmsg(sock, &msg, flags); | |
897 | if (ret < min_ret) { | |
b3fdea6e | 898 | if (ret == -EAGAIN && force_nonblock) { |
100d6b17 | 899 | if (issue_flags & IO_URING_F_MULTISHOT) { |
b3fdea6e DY |
900 | io_kbuf_recycle(req, issue_flags); |
901 | return IOU_ISSUE_SKIP_COMPLETE; | |
902 | } | |
903 | ||
f9ead18c | 904 | return -EAGAIN; |
b3fdea6e | 905 | } |
f9ead18c JA |
906 | if (ret > 0 && io_net_retry(sock, flags)) { |
907 | sr->len -= ret; | |
908 | sr->buf += ret; | |
909 | sr->done_io += ret; | |
910 | req->flags |= REQ_F_PARTIAL_IO; | |
911 | return -EAGAIN; | |
912 | } | |
95eafc74 PB |
913 | if (ret == -ERESTARTSYS) |
914 | ret = -EINTR; | |
f9ead18c JA |
915 | req_set_fail(req); |
916 | } else if ((flags & MSG_WAITALL) && (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) { | |
917 | out_free: | |
918 | req_set_fail(req); | |
919 | } | |
920 | ||
d4e097da | 921 | if (ret > 0) |
f9ead18c JA |
922 | ret += sr->done_io; |
923 | else if (sr->done_io) | |
924 | ret = sr->done_io; | |
d4e097da DY |
925 | else |
926 | io_kbuf_recycle(req, issue_flags); | |
927 | ||
f9ead18c JA |
928 | cflags = io_put_kbuf(req, issue_flags); |
929 | if (msg.msg_inq) | |
930 | cflags |= IORING_CQE_F_SOCK_NONEMPTY; | |
b3fdea6e | 931 | |
100d6b17 | 932 | if (!io_recv_finish(req, &ret, cflags, ret <= 0, issue_flags)) |
b3fdea6e DY |
933 | goto retry_multishot; |
934 | ||
935 | return ret; | |
f9ead18c JA |
936 | } |
937 | ||
b0e9b551 | 938 | void io_send_zc_cleanup(struct io_kiocb *req) |
b48c312b | 939 | { |
ac9e5784 | 940 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
493108d9 | 941 | struct io_async_msghdr *io; |
b48c312b | 942 | |
493108d9 PB |
943 | if (req_has_async_data(req)) { |
944 | io = req->async_data; | |
4c17a496 PB |
945 | /* might be ->fast_iov if *msg_copy_hdr failed */ |
946 | if (io->free_iov != io->fast_iov) | |
947 | kfree(io->free_iov); | |
493108d9 | 948 | } |
a75155fa | 949 | if (zc->notif) { |
a75155fa PB |
950 | io_notif_flush(zc->notif); |
951 | zc->notif = NULL; | |
952 | } | |
b48c312b PB |
953 | } |
954 | ||
40725d1b PB |
955 | #define IO_ZC_FLAGS_COMMON (IORING_RECVSEND_POLL_FIRST | IORING_RECVSEND_FIXED_BUF) |
956 | #define IO_ZC_FLAGS_VALID (IO_ZC_FLAGS_COMMON | IORING_SEND_ZC_REPORT_USAGE) | |
957 | ||
b0e9b551 | 958 | int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
06a5464b | 959 | { |
ac9e5784 | 960 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
10c7d33e | 961 | struct io_ring_ctx *ctx = req->ctx; |
b48c312b | 962 | struct io_kiocb *notif; |
06a5464b | 963 | |
493108d9 | 964 | if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3))) |
b48c312b PB |
965 | return -EINVAL; |
966 | /* we don't support IOSQE_CQE_SKIP_SUCCESS just yet */ | |
967 | if (req->flags & REQ_F_CQE_SKIP) | |
06a5464b PB |
968 | return -EINVAL; |
969 | ||
e3366e02 PB |
970 | notif = zc->notif = io_alloc_notif(ctx); |
971 | if (!notif) | |
972 | return -ENOMEM; | |
973 | notif->cqe.user_data = req->cqe.user_data; | |
974 | notif->cqe.res = 0; | |
975 | notif->cqe.flags = IORING_CQE_F_NOTIF; | |
976 | req->flags |= REQ_F_NEED_CLEANUP; | |
40725d1b PB |
977 | |
978 | zc->flags = READ_ONCE(sqe->ioprio); | |
979 | if (unlikely(zc->flags & ~IO_ZC_FLAGS_COMMON)) { | |
980 | if (zc->flags & ~IO_ZC_FLAGS_VALID) | |
981 | return -EINVAL; | |
982 | if (zc->flags & IORING_SEND_ZC_REPORT_USAGE) { | |
983 | io_notif_set_extended(notif); | |
984 | io_notif_to_data(notif)->zc_report = true; | |
985 | } | |
986 | } | |
987 | ||
10c7d33e PB |
988 | if (zc->flags & IORING_RECVSEND_FIXED_BUF) { |
989 | unsigned idx = READ_ONCE(sqe->buf_index); | |
990 | ||
991 | if (unlikely(idx >= ctx->nr_user_bufs)) | |
992 | return -EFAULT; | |
993 | idx = array_index_nospec(idx, ctx->nr_user_bufs); | |
994 | req->imu = READ_ONCE(ctx->user_bufs[idx]); | |
e3366e02 | 995 | io_req_set_rsrc_node(notif, ctx, 0); |
10c7d33e | 996 | } |
06a5464b | 997 | |
493108d9 PB |
998 | if (req->opcode == IORING_OP_SEND_ZC) { |
999 | if (READ_ONCE(sqe->__pad3[0])) | |
1000 | return -EINVAL; | |
1001 | zc->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
1002 | zc->addr_len = READ_ONCE(sqe->addr_len); | |
1003 | } else { | |
1004 | if (unlikely(sqe->addr2 || sqe->file_index)) | |
1005 | return -EINVAL; | |
1006 | if (unlikely(zc->flags & IORING_RECVSEND_FIXED_BUF)) | |
1007 | return -EINVAL; | |
1008 | } | |
1009 | ||
06a5464b PB |
1010 | zc->buf = u64_to_user_ptr(READ_ONCE(sqe->addr)); |
1011 | zc->len = READ_ONCE(sqe->len); | |
1012 | zc->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; | |
06a5464b PB |
1013 | if (zc->msg_flags & MSG_DONTWAIT) |
1014 | req->flags |= REQ_F_NOWAIT; | |
092aeedb | 1015 | |
4a933e62 | 1016 | zc->done_io = 0; |
092aeedb | 1017 | |
06a5464b PB |
1018 | #ifdef CONFIG_COMPAT |
1019 | if (req->ctx->compat) | |
1020 | zc->msg_flags |= MSG_CMSG_COMPAT; | |
1021 | #endif | |
1022 | return 0; | |
1023 | } | |
1024 | ||
cd9021e8 PB |
1025 | static int io_sg_from_iter_iovec(struct sock *sk, struct sk_buff *skb, |
1026 | struct iov_iter *from, size_t length) | |
1027 | { | |
1028 | skb_zcopy_downgrade_managed(skb); | |
1029 | return __zerocopy_sg_from_iter(NULL, sk, skb, from, length); | |
1030 | } | |
1031 | ||
3ff1a0d3 PB |
1032 | static int io_sg_from_iter(struct sock *sk, struct sk_buff *skb, |
1033 | struct iov_iter *from, size_t length) | |
1034 | { | |
1035 | struct skb_shared_info *shinfo = skb_shinfo(skb); | |
1036 | int frag = shinfo->nr_frags; | |
1037 | int ret = 0; | |
1038 | struct bvec_iter bi; | |
1039 | ssize_t copied = 0; | |
1040 | unsigned long truesize = 0; | |
1041 | ||
cd9021e8 | 1042 | if (!frag) |
3ff1a0d3 | 1043 | shinfo->flags |= SKBFL_MANAGED_FRAG_REFS; |
cd9021e8 | 1044 | else if (unlikely(!skb_zcopy_managed(skb))) |
3ff1a0d3 | 1045 | return __zerocopy_sg_from_iter(NULL, sk, skb, from, length); |
3ff1a0d3 PB |
1046 | |
1047 | bi.bi_size = min(from->count, length); | |
1048 | bi.bi_bvec_done = from->iov_offset; | |
1049 | bi.bi_idx = 0; | |
1050 | ||
1051 | while (bi.bi_size && frag < MAX_SKB_FRAGS) { | |
1052 | struct bio_vec v = mp_bvec_iter_bvec(from->bvec, bi); | |
1053 | ||
1054 | copied += v.bv_len; | |
1055 | truesize += PAGE_ALIGN(v.bv_len + v.bv_offset); | |
1056 | __skb_fill_page_desc_noacc(shinfo, frag++, v.bv_page, | |
1057 | v.bv_offset, v.bv_len); | |
1058 | bvec_iter_advance_single(from->bvec, &bi, v.bv_len); | |
1059 | } | |
1060 | if (bi.bi_size) | |
1061 | ret = -EMSGSIZE; | |
1062 | ||
1063 | shinfo->nr_frags = frag; | |
1064 | from->bvec += bi.bi_idx; | |
1065 | from->nr_segs -= bi.bi_idx; | |
dfb58b17 | 1066 | from->count -= copied; |
3ff1a0d3 PB |
1067 | from->iov_offset = bi.bi_bvec_done; |
1068 | ||
1069 | skb->data_len += copied; | |
1070 | skb->len += copied; | |
1071 | skb->truesize += truesize; | |
1072 | ||
1073 | if (sk && sk->sk_type == SOCK_STREAM) { | |
1074 | sk_wmem_queued_add(sk, truesize); | |
1075 | if (!skb_zcopy_pure(skb)) | |
1076 | sk_mem_charge(sk, truesize); | |
1077 | } else { | |
1078 | refcount_add(truesize, &skb->sk->sk_wmem_alloc); | |
1079 | } | |
1080 | return ret; | |
1081 | } | |
1082 | ||
b0e9b551 | 1083 | int io_send_zc(struct io_kiocb *req, unsigned int issue_flags) |
06a5464b | 1084 | { |
6ae61b7a | 1085 | struct sockaddr_storage __address; |
ac9e5784 | 1086 | struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg); |
06a5464b PB |
1087 | struct msghdr msg; |
1088 | struct iovec iov; | |
1089 | struct socket *sock; | |
6ae91ac9 | 1090 | unsigned msg_flags; |
06a5464b PB |
1091 | int ret, min_ret = 0; |
1092 | ||
06a5464b PB |
1093 | sock = sock_from_file(req->file); |
1094 | if (unlikely(!sock)) | |
1095 | return -ENOTSOCK; | |
edf81438 PB |
1096 | if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) |
1097 | return -EOPNOTSUPP; | |
06a5464b | 1098 | |
06a5464b PB |
1099 | msg.msg_name = NULL; |
1100 | msg.msg_control = NULL; | |
1101 | msg.msg_controllen = 0; | |
1102 | msg.msg_namelen = 0; | |
1103 | ||
86dc8f23 | 1104 | if (zc->addr) { |
581711c4 PB |
1105 | if (req_has_async_data(req)) { |
1106 | struct io_async_msghdr *io = req->async_data; | |
1107 | ||
6ae61b7a | 1108 | msg.msg_name = &io->addr; |
581711c4 PB |
1109 | } else { |
1110 | ret = move_addr_to_kernel(zc->addr, zc->addr_len, &__address); | |
1111 | if (unlikely(ret < 0)) | |
1112 | return ret; | |
1113 | msg.msg_name = (struct sockaddr *)&__address; | |
581711c4 | 1114 | } |
86dc8f23 PB |
1115 | msg.msg_namelen = zc->addr_len; |
1116 | } | |
1117 | ||
3c840053 PB |
1118 | if (!(req->flags & REQ_F_POLLED) && |
1119 | (zc->flags & IORING_RECVSEND_POLL_FIRST)) | |
6ae61b7a | 1120 | return io_setup_async_addr(req, &__address, issue_flags); |
3c840053 | 1121 | |
10c7d33e | 1122 | if (zc->flags & IORING_RECVSEND_FIXED_BUF) { |
de4eda9d | 1123 | ret = io_import_fixed(ITER_SOURCE, &msg.msg_iter, req->imu, |
10c7d33e PB |
1124 | (u64)(uintptr_t)zc->buf, zc->len); |
1125 | if (unlikely(ret)) | |
986e263d | 1126 | return ret; |
cd9021e8 | 1127 | msg.sg_from_iter = io_sg_from_iter; |
10c7d33e | 1128 | } else { |
42385b02 | 1129 | io_notif_set_extended(zc->notif); |
de4eda9d | 1130 | ret = import_single_range(ITER_SOURCE, zc->buf, zc->len, &iov, |
10c7d33e PB |
1131 | &msg.msg_iter); |
1132 | if (unlikely(ret)) | |
1133 | return ret; | |
b48c312b | 1134 | ret = io_notif_account_mem(zc->notif, zc->len); |
2e32ba56 PB |
1135 | if (unlikely(ret)) |
1136 | return ret; | |
cd9021e8 | 1137 | msg.sg_from_iter = io_sg_from_iter_iovec; |
10c7d33e | 1138 | } |
06a5464b PB |
1139 | |
1140 | msg_flags = zc->msg_flags | MSG_ZEROCOPY; | |
1141 | if (issue_flags & IO_URING_F_NONBLOCK) | |
1142 | msg_flags |= MSG_DONTWAIT; | |
1143 | if (msg_flags & MSG_WAITALL) | |
1144 | min_ret = iov_iter_count(&msg.msg_iter); | |
1145 | ||
1146 | msg.msg_flags = msg_flags; | |
b48c312b | 1147 | msg.msg_ubuf = &io_notif_to_data(zc->notif)->uarg; |
06a5464b PB |
1148 | ret = sock_sendmsg(sock, &msg); |
1149 | ||
1150 | if (unlikely(ret < min_ret)) { | |
1151 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
6ae61b7a | 1152 | return io_setup_async_addr(req, &__address, issue_flags); |
581711c4 | 1153 | |
4a933e62 PB |
1154 | if (ret > 0 && io_net_retry(sock, msg.msg_flags)) { |
1155 | zc->len -= ret; | |
1156 | zc->buf += ret; | |
1157 | zc->done_io += ret; | |
1158 | req->flags |= REQ_F_PARTIAL_IO; | |
6ae61b7a | 1159 | return io_setup_async_addr(req, &__address, issue_flags); |
4a933e62 PB |
1160 | } |
1161 | if (ret == -ERESTARTSYS) | |
1162 | ret = -EINTR; | |
5a848b7c | 1163 | req_set_fail(req); |
06a5464b PB |
1164 | } |
1165 | ||
4a933e62 PB |
1166 | if (ret >= 0) |
1167 | ret += zc->done_io; | |
1168 | else if (zc->done_io) | |
1169 | ret = zc->done_io; | |
b48c312b | 1170 | |
108893dd PB |
1171 | /* |
1172 | * If we're in io-wq we can't rely on tw ordering guarantees, defer | |
1173 | * flushing notif to io_send_zc_cleanup() | |
1174 | */ | |
1175 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { | |
1176 | io_notif_flush(zc->notif); | |
1177 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
1178 | } | |
6ae91ac9 | 1179 | io_req_set_res(req, ret, IORING_CQE_F_MORE); |
06a5464b PB |
1180 | return IOU_OK; |
1181 | } | |
1182 | ||
493108d9 PB |
1183 | int io_sendmsg_zc(struct io_kiocb *req, unsigned int issue_flags) |
1184 | { | |
1185 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); | |
1186 | struct io_async_msghdr iomsg, *kmsg; | |
1187 | struct socket *sock; | |
6ae91ac9 | 1188 | unsigned flags; |
493108d9 PB |
1189 | int ret, min_ret = 0; |
1190 | ||
42385b02 PB |
1191 | io_notif_set_extended(sr->notif); |
1192 | ||
493108d9 PB |
1193 | sock = sock_from_file(req->file); |
1194 | if (unlikely(!sock)) | |
1195 | return -ENOTSOCK; | |
cc767e7c PB |
1196 | if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) |
1197 | return -EOPNOTSUPP; | |
493108d9 PB |
1198 | |
1199 | if (req_has_async_data(req)) { | |
1200 | kmsg = req->async_data; | |
1201 | } else { | |
1202 | ret = io_sendmsg_copy_hdr(req, &iomsg); | |
1203 | if (ret) | |
1204 | return ret; | |
1205 | kmsg = &iomsg; | |
1206 | } | |
1207 | ||
1208 | if (!(req->flags & REQ_F_POLLED) && | |
1209 | (sr->flags & IORING_RECVSEND_POLL_FIRST)) | |
1210 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1211 | ||
1212 | flags = sr->msg_flags | MSG_ZEROCOPY; | |
1213 | if (issue_flags & IO_URING_F_NONBLOCK) | |
1214 | flags |= MSG_DONTWAIT; | |
1215 | if (flags & MSG_WAITALL) | |
1216 | min_ret = iov_iter_count(&kmsg->msg.msg_iter); | |
1217 | ||
1218 | kmsg->msg.msg_ubuf = &io_notif_to_data(sr->notif)->uarg; | |
1219 | kmsg->msg.sg_from_iter = io_sg_from_iter_iovec; | |
1220 | ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); | |
1221 | ||
1222 | if (unlikely(ret < min_ret)) { | |
1223 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
1224 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1225 | ||
1226 | if (ret > 0 && io_net_retry(sock, flags)) { | |
1227 | sr->done_io += ret; | |
1228 | req->flags |= REQ_F_PARTIAL_IO; | |
1229 | return io_setup_async_msg(req, kmsg, issue_flags); | |
1230 | } | |
493108d9 PB |
1231 | if (ret == -ERESTARTSYS) |
1232 | ret = -EINTR; | |
1233 | req_set_fail(req); | |
1234 | } | |
1235 | /* fast path, check for non-NULL to avoid function call */ | |
108893dd | 1236 | if (kmsg->free_iov) { |
493108d9 | 1237 | kfree(kmsg->free_iov); |
108893dd PB |
1238 | kmsg->free_iov = NULL; |
1239 | } | |
493108d9 PB |
1240 | |
1241 | io_netmsg_recycle(req, issue_flags); | |
1242 | if (ret >= 0) | |
1243 | ret += sr->done_io; | |
1244 | else if (sr->done_io) | |
1245 | ret = sr->done_io; | |
1246 | ||
108893dd PB |
1247 | /* |
1248 | * If we're in io-wq we can't rely on tw ordering guarantees, defer | |
1249 | * flushing notif to io_send_zc_cleanup() | |
1250 | */ | |
1251 | if (!(issue_flags & IO_URING_F_UNLOCKED)) { | |
1252 | io_notif_flush(sr->notif); | |
1253 | req->flags &= ~REQ_F_NEED_CLEANUP; | |
1254 | } | |
6ae91ac9 | 1255 | io_req_set_res(req, ret, IORING_CQE_F_MORE); |
493108d9 PB |
1256 | return IOU_OK; |
1257 | } | |
1258 | ||
7e6b638e PB |
1259 | void io_sendrecv_fail(struct io_kiocb *req) |
1260 | { | |
1261 | struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); | |
7e6b638e PB |
1262 | |
1263 | if (req->flags & REQ_F_PARTIAL_IO) | |
6ae91ac9 PB |
1264 | req->cqe.res = sr->done_io; |
1265 | ||
c4c0009e | 1266 | if ((req->flags & REQ_F_NEED_CLEANUP) && |
6ae91ac9 PB |
1267 | (req->opcode == IORING_OP_SEND_ZC || req->opcode == IORING_OP_SENDMSG_ZC)) |
1268 | req->cqe.flags |= IORING_CQE_F_MORE; | |
5693bcce PB |
1269 | } |
1270 | ||
f9ead18c JA |
1271 | int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
1272 | { | |
f2ccb5ae | 1273 | struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept); |
f9ead18c JA |
1274 | unsigned flags; |
1275 | ||
1276 | if (sqe->len || sqe->buf_index) | |
1277 | return -EINVAL; | |
1278 | ||
1279 | accept->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
1280 | accept->addr_len = u64_to_user_ptr(READ_ONCE(sqe->addr2)); | |
1281 | accept->flags = READ_ONCE(sqe->accept_flags); | |
1282 | accept->nofile = rlimit(RLIMIT_NOFILE); | |
1283 | flags = READ_ONCE(sqe->ioprio); | |
1284 | if (flags & ~IORING_ACCEPT_MULTISHOT) | |
1285 | return -EINVAL; | |
1286 | ||
1287 | accept->file_slot = READ_ONCE(sqe->file_index); | |
1288 | if (accept->file_slot) { | |
1289 | if (accept->flags & SOCK_CLOEXEC) | |
1290 | return -EINVAL; | |
1291 | if (flags & IORING_ACCEPT_MULTISHOT && | |
1292 | accept->file_slot != IORING_FILE_INDEX_ALLOC) | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | if (accept->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1296 | return -EINVAL; | |
1297 | if (SOCK_NONBLOCK != O_NONBLOCK && (accept->flags & SOCK_NONBLOCK)) | |
1298 | accept->flags = (accept->flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1299 | if (flags & IORING_ACCEPT_MULTISHOT) | |
1300 | req->flags |= REQ_F_APOLL_MULTISHOT; | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | int io_accept(struct io_kiocb *req, unsigned int issue_flags) | |
1305 | { | |
1306 | struct io_ring_ctx *ctx = req->ctx; | |
f2ccb5ae | 1307 | struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept); |
f9ead18c JA |
1308 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; |
1309 | unsigned int file_flags = force_nonblock ? O_NONBLOCK : 0; | |
1310 | bool fixed = !!accept->file_slot; | |
1311 | struct file *file; | |
1312 | int ret, fd; | |
1313 | ||
17add5ce PB |
1314 | if (!io_check_multishot(req, issue_flags)) |
1315 | return -EAGAIN; | |
f9ead18c JA |
1316 | retry: |
1317 | if (!fixed) { | |
1318 | fd = __get_unused_fd_flags(accept->flags, accept->nofile); | |
1319 | if (unlikely(fd < 0)) | |
1320 | return fd; | |
1321 | } | |
1322 | file = do_accept(req->file, file_flags, accept->addr, accept->addr_len, | |
1323 | accept->flags); | |
1324 | if (IS_ERR(file)) { | |
1325 | if (!fixed) | |
1326 | put_unused_fd(fd); | |
1327 | ret = PTR_ERR(file); | |
1328 | if (ret == -EAGAIN && force_nonblock) { | |
1329 | /* | |
1330 | * if it's multishot and polled, we don't need to | |
1331 | * return EAGAIN to arm the poll infra since it | |
1332 | * has already been done | |
1333 | */ | |
91482864 | 1334 | if (issue_flags & IO_URING_F_MULTISHOT) |
f9ead18c JA |
1335 | ret = IOU_ISSUE_SKIP_COMPLETE; |
1336 | return ret; | |
1337 | } | |
1338 | if (ret == -ERESTARTSYS) | |
1339 | ret = -EINTR; | |
1340 | req_set_fail(req); | |
1341 | } else if (!fixed) { | |
1342 | fd_install(fd, file); | |
1343 | ret = fd; | |
1344 | } else { | |
1345 | ret = io_fixed_fd_install(req, issue_flags, file, | |
1346 | accept->file_slot); | |
1347 | } | |
1348 | ||
1349 | if (!(req->flags & REQ_F_APOLL_MULTISHOT)) { | |
1350 | io_req_set_res(req, ret, 0); | |
1351 | return IOU_OK; | |
1352 | } | |
f9ead18c | 1353 | |
515e2696 DY |
1354 | if (ret < 0) |
1355 | return ret; | |
9b8c5475 DY |
1356 | if (io_aux_cqe(ctx, issue_flags & IO_URING_F_COMPLETE_DEFER, |
1357 | req->cqe.user_data, ret, IORING_CQE_F_MORE, true)) | |
d245bca6 | 1358 | goto retry; |
cbd25748 | 1359 | |
515e2696 | 1360 | return -ECANCELED; |
f9ead18c JA |
1361 | } |
1362 | ||
1363 | int io_socket_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
1364 | { | |
f2ccb5ae | 1365 | struct io_socket *sock = io_kiocb_to_cmd(req, struct io_socket); |
f9ead18c JA |
1366 | |
1367 | if (sqe->addr || sqe->rw_flags || sqe->buf_index) | |
1368 | return -EINVAL; | |
1369 | ||
1370 | sock->domain = READ_ONCE(sqe->fd); | |
1371 | sock->type = READ_ONCE(sqe->off); | |
1372 | sock->protocol = READ_ONCE(sqe->len); | |
1373 | sock->file_slot = READ_ONCE(sqe->file_index); | |
1374 | sock->nofile = rlimit(RLIMIT_NOFILE); | |
1375 | ||
1376 | sock->flags = sock->type & ~SOCK_TYPE_MASK; | |
1377 | if (sock->file_slot && (sock->flags & SOCK_CLOEXEC)) | |
1378 | return -EINVAL; | |
1379 | if (sock->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1380 | return -EINVAL; | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | int io_socket(struct io_kiocb *req, unsigned int issue_flags) | |
1385 | { | |
f2ccb5ae | 1386 | struct io_socket *sock = io_kiocb_to_cmd(req, struct io_socket); |
f9ead18c JA |
1387 | bool fixed = !!sock->file_slot; |
1388 | struct file *file; | |
1389 | int ret, fd; | |
1390 | ||
1391 | if (!fixed) { | |
1392 | fd = __get_unused_fd_flags(sock->flags, sock->nofile); | |
1393 | if (unlikely(fd < 0)) | |
1394 | return fd; | |
1395 | } | |
1396 | file = __sys_socket_file(sock->domain, sock->type, sock->protocol); | |
1397 | if (IS_ERR(file)) { | |
1398 | if (!fixed) | |
1399 | put_unused_fd(fd); | |
1400 | ret = PTR_ERR(file); | |
1401 | if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) | |
1402 | return -EAGAIN; | |
1403 | if (ret == -ERESTARTSYS) | |
1404 | ret = -EINTR; | |
1405 | req_set_fail(req); | |
1406 | } else if (!fixed) { | |
1407 | fd_install(fd, file); | |
1408 | ret = fd; | |
1409 | } else { | |
1410 | ret = io_fixed_fd_install(req, issue_flags, file, | |
1411 | sock->file_slot); | |
1412 | } | |
1413 | io_req_set_res(req, ret, 0); | |
1414 | return IOU_OK; | |
1415 | } | |
1416 | ||
1417 | int io_connect_prep_async(struct io_kiocb *req) | |
1418 | { | |
1419 | struct io_async_connect *io = req->async_data; | |
f2ccb5ae | 1420 | struct io_connect *conn = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1421 | |
1422 | return move_addr_to_kernel(conn->addr, conn->addr_len, &io->address); | |
1423 | } | |
1424 | ||
1425 | int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | |
1426 | { | |
f2ccb5ae | 1427 | struct io_connect *conn = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1428 | |
1429 | if (sqe->len || sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in) | |
1430 | return -EINVAL; | |
1431 | ||
1432 | conn->addr = u64_to_user_ptr(READ_ONCE(sqe->addr)); | |
1433 | conn->addr_len = READ_ONCE(sqe->addr2); | |
3fb1bd68 | 1434 | conn->in_progress = false; |
f9ead18c JA |
1435 | return 0; |
1436 | } | |
1437 | ||
1438 | int io_connect(struct io_kiocb *req, unsigned int issue_flags) | |
1439 | { | |
f2ccb5ae | 1440 | struct io_connect *connect = io_kiocb_to_cmd(req, struct io_connect); |
f9ead18c JA |
1441 | struct io_async_connect __io, *io; |
1442 | unsigned file_flags; | |
1443 | int ret; | |
1444 | bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | |
1445 | ||
3fb1bd68 JA |
1446 | if (connect->in_progress) { |
1447 | struct socket *socket; | |
1448 | ||
1449 | ret = -ENOTSOCK; | |
1450 | socket = sock_from_file(req->file); | |
1451 | if (socket) | |
1452 | ret = sock_error(socket->sk); | |
1453 | goto out; | |
1454 | } | |
1455 | ||
f9ead18c JA |
1456 | if (req_has_async_data(req)) { |
1457 | io = req->async_data; | |
1458 | } else { | |
1459 | ret = move_addr_to_kernel(connect->addr, | |
1460 | connect->addr_len, | |
1461 | &__io.address); | |
1462 | if (ret) | |
1463 | goto out; | |
1464 | io = &__io; | |
1465 | } | |
1466 | ||
1467 | file_flags = force_nonblock ? O_NONBLOCK : 0; | |
1468 | ||
1469 | ret = __sys_connect_file(req->file, &io->address, | |
1470 | connect->addr_len, file_flags); | |
1471 | if ((ret == -EAGAIN || ret == -EINPROGRESS) && force_nonblock) { | |
3fb1bd68 JA |
1472 | if (ret == -EINPROGRESS) { |
1473 | connect->in_progress = true; | |
1474 | } else { | |
1475 | if (req_has_async_data(req)) | |
1476 | return -EAGAIN; | |
1477 | if (io_alloc_async_data(req)) { | |
1478 | ret = -ENOMEM; | |
1479 | goto out; | |
1480 | } | |
1481 | memcpy(req->async_data, &__io, sizeof(__io)); | |
f9ead18c | 1482 | } |
f9ead18c JA |
1483 | return -EAGAIN; |
1484 | } | |
1485 | if (ret == -ERESTARTSYS) | |
1486 | ret = -EINTR; | |
1487 | out: | |
1488 | if (ret < 0) | |
1489 | req_set_fail(req); | |
1490 | io_req_set_res(req, ret, 0); | |
1491 | return IOU_OK; | |
1492 | } | |
43e0bbbd JA |
1493 | |
1494 | void io_netmsg_cache_free(struct io_cache_entry *entry) | |
1495 | { | |
1496 | kfree(container_of(entry, struct io_async_msghdr, cache)); | |
1497 | } | |
f9ead18c | 1498 | #endif |